After wiping cache, do a complete few battery cycle (let the phone go down as low as 4% and charge it completely 100%), this will calibrate your battery, after 5 cycles, normally your phone's battery should start to work normal.

Jelly BeanFeb 28, 2018

No I am not.
And what kind of question is this?
First of all where are some screenshots with this draining?
Secondly, what sort of answers do u expect? For sure some will say yes and some will say no. You have to be more specific.

Jelly BeanFeb 28, 2018

Okay. But when i purchased my device one year back with 4.5.0 it was a perfect device, as i started upgrading, hooooo it was the biggest mistakes ever....

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Can't argue with you, with updates there may be a few bugs now and then, but after a major upgrade, do a clean install, after you backup your important data like photos and music and the phone will feel fresh again